discoid Meaning, Definition & Usage

  1. adjective satellite having a flat circular shape
    disklike; discoidal; disc-shaped; disk-shaped; disclike.

WordNet

Dis"coid adjective
Etymology
Gr. quoit-shaped, a round plate, quoit + form, shape: cf. F. discoïde. See Disk.
Definitions
  1. Having the form of a disk, as those univalve shells which have the whorls in one plane, so as to form a disk, as the pearly nautilus.
Dis"coid noun
Definitions
  1. Anything having the form of a discus or disk; particularly, a discoid shell.

Webster 1913